Add support for Highcharts Gantt (JS) v.11.4.0 #48
Description
Given the recent release of Highcharts Gantt (JS) v.11.4, Highcharts Gantt for Python needs to be updated to align with it.
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Given the recent release of Highcharts Gantt (JS) v.11.4, Highcharts Gantt for Python needs to be updated to align with it.